The ease of use and the capability of the software. It is easy to learn and navigate. The software is very powerful and can be used for any type of machinery. There are many different features in the software that can be used to diagnose the machine. I have not found anything that I dislike about this software. The software is very easy to use. I would recommend this software to anyone that wants to diagnose their machine. The software is easy to learn and use. I am able to diagnose my machine with ease.